US10995714B2 - Outboard motor - Google Patents
Outboard motor Download PDFInfo
- Publication number
- US10995714B2 US10995714B2 US16/041,861 US201816041861A US10995714B2 US 10995714 B2 US10995714 B2 US 10995714B2 US 201816041861 A US201816041861 A US 201816041861A US 10995714 B2 US10995714 B2 US 10995714B2
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- engine
- outboard motor
- controller
- pump
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- 239000000446 fuel Substances 0.000 claims abstract description 190
- 230000037361 pathway Effects 0.000 claims abstract description 38
- 239000002828 fuel tank Substances 0.000 claims abstract description 29
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 230000004044 response Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 description 11
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/20—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines characterised by means for preventing vapour lock
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
- B63H20/001—Arrangements, apparatus and methods for handling fluids used in outboard drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
- F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3082—Control of electrical fuel pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/06—Feeding by means of driven pumps mechanically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/228—Warning displays
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/0275—Arrangement of common rails
- F02M63/0285—Arrangement of common rails having more than one common rail
Definitions
- the present invention relates to an outboard motor.
- An engine for an outboard motor is connected to a fuel tank through a fuel pathway such as a hose.
- the fuel pathway is provided with a fuel pump, and the fuel pump supplies fuel from the fuel tank to the engine through the fuel pathway.
- Japan Utility Model Application Publication No. H07-14159 discloses an internal combustion engine in which a fuel tank and a fuel pump are connected through piping, and the fuel pump and fuel injection devices are connected through a delivery pipe.
- air enters the fuel pathway it takes time to supply the fuel to the engine.
- Preferred embodiments of the present invention provide outboard motors each including an engine, a fuel tank, a fuel pathway, a fuel pump, and a controller.
- the engine includes a fuel injector.
- the fuel tank includes an internal space in which fuel is stored.
- the fuel pathway is connected to the fuel injector and the fuel tank.
- the fuel pump is disposed in the fuel pathway, and supplies the fuel from the fuel tank to the fuel injector.
- the controller controls the fuel pump.
- the controller is configured or programmed to determine whether or not a start condition, indicating that air has entered the fuel pathway, is satisfied.
- the controller is further configured or programmed to execute an air releasing control to open the fuel injector and drive the fuel pump when the start condition is satisfied.
- the controller when the air has entered the fuel pathway, the controller is configured or programmed to determine that the start condition is satisfied. Then, the controller opens the fuel injector and drives the fuel pump. Accordingly, the air is discharged from the fuel pathway, and starting of the engine is easier.
- FIG. 1 is a perspective view of a watercraft to which an outboard motor according to a preferred embodiment of the present invention is mounted.
- FIG. 2 is a side view of the outboard motor.
- FIG. 3 is a schematic diagram of a fuel supply system of the outboard motor.
- FIG. 4 is a block diagram of a control system of the outboard motor.
- FIG. 5 is a chart showing control to be executed by a controller.
- FIG. 1 is a perspective view of a watercraft 1 to which an outboard motor 2 according to a preferred embodiment of the present invention is mounted.
- the outboard motor 2 is attached to the stern of the watercraft 1 .
- the outboard motor 2 generates a thrust to propel the watercraft 1 .
- the single outboard motor 2 is mounted to the watercraft 1 , but alternatively, two or more outboard motors 2 may be mounted to the watercraft 1 .
- the watercraft 1 includes a cockpit 3 .
- a steering member 4 and a remote control 5 are disposed in the cockpit 3 .
- the steering member 4 allows an operator to steer and control the traveling direction of the watercraft 1 .
- the remote control 5 allows the operator to regulate the velocity of the watercraft 1 .
- the remote control also allows the operator to switch between forward movement and backward movement of the watercraft 1 .
- FIG. 2 is a side view of the outboard motor 2 .
- the outboard motor 2 includes an outboard motor body 10 and a bracket 11 .
- the outboard motor body 10 is attached to the watercraft 1 through the bracket 11 .
- the outboard motor body 10 includes an engine 12 , a driveshaft 13 , a propeller shaft 14 , and a shift mechanism 15 .
- the engine 12 generates the thrust to propel the watercraft 1 .
- the engine 12 is preferably a direct injection engine, for example.
- the engine 12 includes a crankshaft 16 .
- the crankshaft 16 extends in the vertical direction.
- the driveshaft 13 is connected to the crankshaft 16 .
- the driveshaft 13 extends in the vertical direction.
- the propeller shaft 14 extends in the front-and-back direction.
- the propeller shaft 14 is connected to the driveshaft 13 through the shift mechanism 15 .
- a propeller 17 is connected to the propeller shaft 14 .
- the shift mechanism 15 switches the rotational direction of power transmitted from the driveshaft 13 to the propeller shaft 14 .
- the shift mechanism 15 includes a plurality of gears and a clutch that changes meshing of the gears.
- FIG. 3 is a schematic diagram of a fuel supply system of the outboard motor 2 .
- the engine 12 of the outboard motor 2 includes a plurality of fuel injectors 21 and 22 . More specifically, the engine 12 includes a plurality of first fuel injectors 21 and a plurality of second fuel injectors 22 .
- the plurality of first fuel injectors 21 are connected to a first common rail 23 .
- Each first fuel injector 21 includes an electromagnetic valve 24 .
- the electromagnetic valve 24 opens and closes the injection port of each first fuel injector 21 .
- Each first fuel injector 21 injects fuel into a combustion chamber of the engine 12 while the electromagnetic valve 24 thereof is open.
- the plurality of second fuel injectors 22 are connected to a second common rail 25 .
- Each second fuel injector 22 includes an electromagnetic valve 26 .
- the electromagnetic valve 26 opens and closes the injection port of each second fuel injector 22 .
- Each second fuel injector 22 injects fuel into the combustion chamber of the engine 12 while the electromagnetic valve 26 thereof is open.
- the fuel supply system of the outboard motor 2 includes a main tank 31 , a fuel tank 32 , and a fuel pathway 33 .
- the main tank 31 includes an internal space in which the fuel is stored.
- the main tank 31 is disposed inside the watercraft 1 .
- the fuel pathway 33 connects the main tank 31 and the first and second fuel injectors 21 and 22 to each other.
- the fuel pathway 33 is, for instance, a hose. It should be noted that the fuel pathway 33 may be a pipe.
- the fuel supply system of the outboard motor 2 supplies the fuel from the main tank 31 to the first and second fuel injectors 21 and 22 .
- the fuel tank 32 includes an internal space in which the fuel is stored.
- the fuel tank 32 is disposed inside the outboard motor 2 .
- the fuel tank 32 is disposed between the main tank 31 and the first and second fuel injectors 21 and 22 in the fuel pathway 33 .
- the fuel tank 32 is a vapor separator tank that separates fuel and air from each other.
- the outboard motor 2 includes a primary pump 34 and a fuel pump 35 .
- the primary pump 34 is disposed between the main tank 31 and the fuel tank 32 in the fuel pathway 33 .
- the primary pump 34 supplies the fuel in response to a manual operation.
- the fuel pump 35 is disposed inside the fuel tank 32 .
- the fuel pump 35 is connected to an electric power storage 36 , and is driven by electric power.
- the electric power storage 36 is, for instance, a battery.
- the fuel pump 35 includes an electric motor, for instance, and supplies the fuel when the electric motor is driven by the electric power from the electric power storage 36 .
- a sub pump 37 is disposed inside the fuel tank 32 . Similarly to the fuel pump 35 , the sub pump 37 is connected to the electric power storage 36 , and is driven by electric power.
- the sub pump 37 includes an electric motor, for instance, and supplies the fuel when the electric motor is driven by the electric power from the electric power storage 36 .
- the outboard motor 2 includes a first direct injection pump (hereinafter referred to as “a first DI pump”) 38 and a second direct injection pump (hereinafter referred to as “a second DI pump”) 39 .
- the first DI pump 38 is disposed between the first fuel injectors 21 and the fuel tank 32 .
- the first DI pump 38 supplies the fuel to the first fuel injectors 21 through the first common rail 23 .
- the first DI pump 38 is connected to the crankshaft 16 through a first camshaft 41 .
- the first camshaft 41 is connected to the crankshaft 16 , and is rotated in conjunction with rotation of the crankshaft 16 .
- the first DI pump 38 includes a plunger 42 , an electromagnetic valve 43 , and a compression chamber 44 .
- the plunger 42 compresses the fuel inside the compression chamber 44 of the first DI pump 38 .
- the electromagnetic valve 43 opens and closes the inlet of the compression chamber 44 of the first DI pump 38 .
- the plunger 42 compresses the fuel inside the compression chamber 44 while the inlet of the compression chamber 44 is closed by the electromagnetic valve 43 , the fuel is increased in pressure and is supplied from the first DI pump 38 .
- the second DI pump 39 is connected to the crankshaft 16 through a second camshaft 45 .
- the second camshaft 45 is connected to the crankshaft 16 , and is rotated in conjunction with rotation of the crankshaft 16 .
- the second DI pump 39 is disposed between the second fuel injectors 22 and the fuel tank 32 .
- the second DI pump 39 supplies the fuel to the second fuel injectors 22 through the second common rail 25 .
- the second DI pump 39 includes a plunger 46 , an electromagnetic valve 47 , and a compression chamber 48 .
- the second DI pump 39 preferably has a similar structure to the first DI pump 38 .
- the outboard motor 2 includes a low pressure sensor 51 , a first high pressure sensor 52 , and a second high pressure sensor 53 .
- the low pressure sensor 51 is disposed between the fuel tank 32 and the first and second DI pumps 38 and 39 in the fuel pathway 33 .
- the first high pressure sensor 52 is disposed between the first DI pump 38 and the first fuel injectors 21 in the fuel pathway 33 .
- the second high pressure sensor 53 is disposed between the second DI pump 39 and the second fuel injectors 22 in the fuel pathway 33 .
- Each of the low pressure sensor 51 , the first high pressure sensor 52 , and the second high pressure sensor 53 outputs a signal indicating a detected value of the pressure of the fuel.
- check valves 57 and 58 and a strainer 59 may be disposed between the fuel tank 32 and the first and second DI pumps 38 and 39 in the fuel pathway 33 .
- FIG. 4 is a block diagram of a control system of the outboard motor 2 .
- the outboard motor 2 includes a controller 61 .
- the controller 61 includes a processor such as a CPU and memories such as a RAM and a ROM.
- the controller 61 stores a program or programs and data used to control the outboard motor 2 .
- the controller 61 is in communication with the remote control 5 , and controls the engine 12 and the shift mechanism 15 in response to signals from the remote control 5 , although this configuration is omitted in FIG. 4 .
- the controller 61 is in communication with the low pressure sensor 51 , the first high pressure sensor 52 , and the second high pressure sensor 53 .
- the controller 61 is configured or programmed to receive signals from the low pressure sensor 51 , the first high pressure sensor 52 , and the second high pressure sensor 53 , respectively.
- the controller 61 is in communication with the fuel pump 35 and the sub pump 37 .
- the controller 61 controls the fuel pump 35 and the sub pump 37 by outputting command signals to the fuel pump 35 and the sub pump 37 , respectively. More specifically, the controller 61 controls the discharge pressure of the fuel pump 35 and that of the sub pump 37 by PWM control, for example.
- the controller 61 is in communication with the first and second DI pumps 38 and 39 through a direct injection driver (hereinafter referred to as “a DI driver”) 62 , for example.
- a DI driver direct injection driver
- the controller 61 controls the first and second DI pumps 38 and 39 by outputting command signals to the first and second DI pumps 38 and 39 , respectively, through the DI driver 62 . More specifically, the controller 61 opens and closes the inlet of the compression chamber 44 of the first DI pump 38 and that of the compression chamber 48 of the second DI pump 39 by outputting command signals to the electromagnetic valve 43 of the first DI pump 38 and the electromagnetic valve 47 of the second DI pump 39 , respectively.
- the controller 61 is in communication with the first fuel injectors 21 and the second fuel injectors 22 .
- the controller 61 controls the first fuel injectors 21 and the second fuel injectors 22 by outputting command signals to the first fuel injectors 21 and the second fuel injectors 22 , respectively. More specifically, the controller 61 opens and closes the first fuel injectors 21 and the second fuel injectors 22 by outputting command signals to the electromagnetic valves 24 of the first fuel injectors 21 and the electromagnetic valves 26 of the second fuel injectors 22 , respectively.
- the outboard motor 2 includes an engine switch 63 .
- the engine switch 63 is in communication with the controller 61 .
- the engine switch 63 is switchable between an off position and an on position.
- the engine switch 63 outputs a signal indicating the position thereof to the controller 61 .
- the controller 61 When the engine switch 63 is set in the on position, the controller 61 permits starting the engine 12 or starts the engine 12 . When the engine switch 63 is set in the off position, the controller 61 prohibits starting the engine 12 or stops the engine 12 .
- the outboard motor 2 includes a rotational speed sensor 64 .
- the rotational speed sensor 64 outputs a signal indicating the rotational speed of the engine 12 .
- the rotational speed sensor 64 is in communication with the controller 61 .
- the controller 61 receives the signal from the rotational speed sensor 64 .
- the outboard motor 2 includes a display 65 as an output, for example.
- the display 65 is in communication with the controller 61 .
- the display 65 receives a command signal from the controller 61 and displays a variety of information.
- the outboard motor 2 includes an input/output (I/O) port 66 .
- a signal from an external device 100 is inputted to the I/O port 66 .
- the controller 61 receives the signal from the external device 100 through the I/O port 66 . Additionally, the controller 61 outputs a signal to the external device 100 through the I/O port 66 .
- the external device 100 is, for example, a computing device such as a personal computer, a smart phone, or a tablet computer.
- the I/O port 66 may be an arbitrary interface as long as it is connectable to the external device 100 .
- the above communications between the components of the outboard motor 2 and the controller 61 may be wired communications, or alternatively, may be wireless communications.
- FIG. 5 is a chart showing a series of processes to be executed by the controller 61 .
- step S 1 air has not entered the fuel pathway 33 yet, and hence, the controller 61 executes normal control.
- the controller 61 obtains a value of the discharge pressure of the fuel pump 35 , and executes feedback control so as to make the value of the discharge pressure approach a predetermined target value.
- the controller 61 obtains the value of the discharge pressure of the fuel pump 35 from the signal received from the low pressure sensor 51 .
- the target value of the discharge pressure of the fuel pump 35 is set in accordance with, for instance, an operational condition of the outboard motor 2 .
- the controller 61 determines whether or not a start condition 1 is satisfied.
- the start condition 1 includes, for example, that the output of the fuel pump 35 has been kept at a maximum for a predetermined period of time.
- the output of the fuel pump 35 corresponds to a command value transmitted to the fuel pump 35 .
- the start condition 1 also means that the discharge pressure of the fuel pump 35 has been reduced and has not reached the target value yet.
- the controller 61 executes the process in step S 2 .
- step S 2 the controller 61 executes a fuel running-out determining control.
- the controller 61 drives the sub pump 37 , and simultaneously, determines whether or not a start condition 2 is satisfied.
- the start condition 2 includes, for example, that the output of the fuel pump 35 has been kept at a maximum.
- the start condition 2 also means that a reduction in the discharge pressure of the fuel pump 35 is not due to malfunction/breakdown of the fuel pump 35 .
- the controller 61 executes the process in step S 3 .
- the termination condition 1 includes, for example, that the output of the fuel pump 35 has been reduced.
- the termination condition 1 also means that a reduction in the discharge pressure of the fuel pump 35 is due to malfunction/breakdown of the fuel pump 35 .
- step S 3 the controller 61 executes a pump limiting control.
- the controller 61 lowers the upper limit of the output of the fuel pump 35 .
- a termination condition 2 is satisfied during the pump limiting control, the controller 61 terminates the pump limiting control and returns to the normal control.
- the termination condition 2 includes, for example, that the discharge pressure of each of the first and second DI pumps 38 and 39 has been kept greater than or equal to a minimum target value for a predetermined period of time.
- the termination condition 2 also means that fuel supply to the fuel injectors 21 and 22 has been recovered.
- the controller 61 determines whether or not a start condition 3 is satisfied.
- the start condition 3 includes, for example, that engine stalling has occurred or that the engine switch 63 is set in the off position. In other words, the start condition 3 means that the engine 12 is being stopped or is stopped.
- the controller 61 determines whether or not engine stalling has occurred based on the signal received from the rotational speed sensor 64 .
- the controller 61 determines whether or not the engine switch 63 is set in the off position based on the signal received from the engine switch 63 .
- step S 4 the controller 61 executes the process in step S 4 .
- step S 4 the controller 61 executes an air releasing control.
- the controller 61 opens the first and second fuel injectors 21 and 22 and, simultaneously, drives the fuel pump 35 . More specifically, the controller 61 outputs command signals to the electromagnetic valves 24 and 26 , respectively, in order to intermittently open and close the first and second fuel injectors 21 and 22 .
- the controller 61 may open and close all of the plurality of first fuel injectors 21 and all of the plurality of second fuel injectors 22 . Alternatively, the controller 61 may open and close only some of the plurality of first fuel injectors 21 and only some of the plurality of second fuel injectors 22 .
- the electromagnetic valves 43 and 47 of the first and second DI pumps 38 and 39 are open. Additionally, the controller 61 drives the fuel pump 35 such that the discharge pressure of the fuel pump 35 becomes a predetermined target value.
- the target value of the discharge pressure during the air releasing control may be the same as or different from that of the discharge pressure in the above-described normal control. Additionally, the controller 61 may prohibit starting of the engine 12 during execution of the air releasing control. Accordingly, driving of the first and second DI pumps 38 and 39 is prohibited.
- the controller 61 displays an alert on the display 65 during execution of the air releasing control.
- the alert includes, for example, a message encouraging a user to check the fuel pathway 33 and/or a message indicating that the engine 12 cannot be restarted immediately after being stopped. Additionally, the alert may include, for example, a message indicating that at least one task is required to start the engine 12 .
- the at least one task required to start the engine 12 may include, for instance, executing cranking a plurality of times until start of the engine 12 and/or executing an idling operation after starting the engine 12 .
- the alert is not necessarily made in the form of written messages, and alternatively, may be made in the form of icons.
- the alert may be in the form of sound.
- the outboard motor 2 includes a warning light as an output, the alert may be in the form of lighting the alarm light.
- the controller 61 determines whether or not a termination condition 3 is satisfied.
- the termination condition 3 includes, for example, that a predetermined period of time has elapsed since a start of the air releasing control.
- the controller 61 terminates the air releasing control and returns to the normal control.
- the controller 61 is configured or programmed to execute the air releasing control when the start conditions 1 to 3 are satisfied.
- the start conditions 1 and 2 indicate that air has entered the fuel pathway 33 due to the running out of the fuel.
- the start condition 3 indicates that the engine 12 is being stopped or is stopped.
- the air releasing control is executed by the controller 61 in the outboard motor 2 .
- the first and second fuel injectors 21 and 22 are intermittently opened and closed, and simultaneously, the fuel pump 35 is driven. Accordingly, the air, which has entered and remained in the fuel pathway 33 , is discharged therefrom. As a result, starting of the engine 12 is easier.
- the engine 12 is kept stopped. Hence, driving of the plungers 42 and 46 is held back or delayed in the first and second DI pumps 38 and 39 . Accordingly, reverse flow of the fuel due to driving of the plungers 42 and 46 is prevented.
- the alert is displayed on the display 65 . Therefore, the user is able to recognize that the air releasing control is being performed, and also, easily understand an action to be taken.
- Some of the above-described components of the outboard motor 2 may be changed or omitted. Some of the above-described components of the fuel supply system may be changed or omitted. Some of the above-described controls may be changed or omitted.
- the number of the fuel injectors is not limited to that of the above-described preferred embodiments, and may be changed.
- the number of the fuel injectors is not limited to a plurality, and alternatively, may be one.
- the number of the DI pumps is not limited to two, and alternatively, may be one or more than two.
- the engine is not limited to the direct injection type, and alternatively, may be of another type.
- the fuel tank is not limited to the vapor separator type, and alternatively, may be of another type.
- start conditions 1 to 3 and termination conditions 1 to 3 may be changed or omitted.
- a single or plurality of conditions, different from the above-described start conditions 1 to 3 and termination conditions 1 to 3 may be additionally provided.
- the start conditions may include a condition that the signal from the external device 100 has been inputted to the I/O port 66 .
- the external device 100 may be a computer in which software for maintenance of the outboard motor 2 has been installed.
- Air possibly enters the fuel pathway 33 , for instance, immediately after the outboard motor 2 is assembled for manufacture or repair, or when the user reassembles the fuel supply system.
- the air releasing control may be executed by inputting a command signal to execute the air releasing control from the external device 100 to the I/O port 66 of the outboard motor 2 .
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims (11)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018010735A JP2019127910A (en) | 2018-01-25 | 2018-01-25 | Outboard motor |
JP2018-010735 | 2018-01-25 | ||
JPJP2018-010735 | 2018-01-25 |
Publications (2)
Publication Number | Publication Date |
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US20190226436A1 US20190226436A1 (en) | 2019-07-25 |
US10995714B2 true US10995714B2 (en) | 2021-05-04 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US16/041,861 Active 2039-01-03 US10995714B2 (en) | 2018-01-25 | 2018-07-23 | Outboard motor |
Country Status (3)
Country | Link |
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US (1) | US10995714B2 (en) |
EP (1) | EP3517762B1 (en) |
JP (1) | JP2019127910A (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0714159U (en) | 1993-08-18 | 1995-03-10 | 国産電機株式会社 | Fuel supply device for internal combustion engine |
US5927253A (en) | 1998-02-26 | 1999-07-27 | Ford Global Technologies, Inc. | Fuel system priming method |
US20040211395A1 (en) | 2003-04-23 | 2004-10-28 | Luca Greco | Electronic control system for fuel system priming |
FR2864163A1 (en) | 2003-12-18 | 2005-06-24 | Renault Sas | Fuel system priming process for internal combustion engine, involves actuating fuel pump in anticipated manner during starting-up of engine at time delay period whose adjustment is associated to temporary opening of injectors |
US7216614B2 (en) * | 2004-09-16 | 2007-05-15 | Yamaha Marine Kabushiki Kaisha | Fuel supply device for outboard device |
US20080314349A1 (en) | 2007-06-25 | 2008-12-25 | Robert Bosch Gmbh | Green start engine control systems and methods |
US20100031931A1 (en) * | 2008-08-08 | 2010-02-11 | Yamaha Hatsudoki Kabushiki Kaisha | Marine vessel propulsion device |
-
2018
- 2018-01-25 JP JP2018010735A patent/JP2019127910A/en active Pending
- 2018-07-23 US US16/041,861 patent/US10995714B2/en active Active
-
2019
- 2019-01-23 EP EP19153330.6A patent/EP3517762B1/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0714159U (en) | 1993-08-18 | 1995-03-10 | 国産電機株式会社 | Fuel supply device for internal combustion engine |
US5927253A (en) | 1998-02-26 | 1999-07-27 | Ford Global Technologies, Inc. | Fuel system priming method |
US20040211395A1 (en) | 2003-04-23 | 2004-10-28 | Luca Greco | Electronic control system for fuel system priming |
FR2864163A1 (en) | 2003-12-18 | 2005-06-24 | Renault Sas | Fuel system priming process for internal combustion engine, involves actuating fuel pump in anticipated manner during starting-up of engine at time delay period whose adjustment is associated to temporary opening of injectors |
US7216614B2 (en) * | 2004-09-16 | 2007-05-15 | Yamaha Marine Kabushiki Kaisha | Fuel supply device for outboard device |
US20080314349A1 (en) | 2007-06-25 | 2008-12-25 | Robert Bosch Gmbh | Green start engine control systems and methods |
US20100031931A1 (en) * | 2008-08-08 | 2010-02-11 | Yamaha Hatsudoki Kabushiki Kaisha | Marine vessel propulsion device |
Non-Patent Citations (1)
Title |
---|
English Translation: Bubel et al., French Patent Publication No. FR 2864163 A1, Jun. 2005, French Patent Office Publication (Year : 2005). * |
Also Published As
Publication number | Publication date |
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US20190226436A1 (en) | 2019-07-25 |
JP2019127910A (en) | 2019-08-01 |
EP3517762A1 (en) | 2019-07-31 |
EP3517762B1 (en) | 2021-03-10 |
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